Automatic continuously variable transmission

An automatic, continuously variable transmission comprising a speed-dependent clutch, a section cooperating with said clutch for steplessly controlling the transmission ratio between an input shaft and an output shaft, said section comprising a central shaft having a first longitudinal axis carrying at least one radially extending shaft with a conical body having a second longitudinal axis transverse to said first longitudinal axis rotatable about said second longitudinal axis thereof, said conical body having an outer circumferential surface of concave curvature in the direction of said second longitudinal axis said conical body being longitudinally movable over said radial shaft, and being arranged to be driven for rotation about said shaft, a spring-loaded annular body cooperating with said conical body, depending on the desired torque-speed ratio, via an axial pressure exerted by the speed dependent clutch, along a direction substantially parallel to said first longitudinal axis, with said spring-loaded annular body further having a conical inner circumferential surface of convex curvature in the axial direction of said second longitudinal axis, and means for reversing the direction of rotation of the output shaft relative to the input shaft.